How do I raise the Fan blade? It's scraping and I can't run it.

How do I raise the Fan blade? It's scraping and I can't run it.

The Fan rotating blade looks like it is jammed down too low and is scraping on and hitting the inside plastic frame so that I can't run it. I don't have the strength to pull the blade up so that it will no longer hit the framing. I've tried using pliers to hold the stem and turning the fan both ways and I can not turn it and I do not have anyone to help me. It is really hot and this fan would help to get thru all this heat.

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